CN212183174U - Charging circuit, auxiliary power supply and operation equipment - Google Patents
Charging circuit, auxiliary power supply and operation equipment Download PDFInfo
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- CN212183174U CN212183174U CN202021257599.4U CN202021257599U CN212183174U CN 212183174 U CN212183174 U CN 212183174U CN 202021257599 U CN202021257599 U CN 202021257599U CN 212183174 U CN212183174 U CN 212183174U
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Abstract
An embodiment of the utility model provides a charging circuit, auxiliary power supply and operation equipment relates to power technical field. The charging circuit comprises a low-voltage input module, a high-voltage input module and a power management module, wherein the input end of the low-voltage input module and the input end of the high-voltage input module are electrically connected with an input power supply, and the output end of the low-voltage input module and the output end of the high-voltage input module are electrically connected with the power management module. The low-voltage input module is in a conducting state when the power supply voltage provided by the input power supply is in a first voltage interval so as to provide the power supply voltage to the power supply management module; when the power supply voltage provided by the input power supply is in a second voltage interval, the high-voltage input module performs voltage conversion processing on the power supply voltage to obtain conversion voltage, and provides the conversion voltage to the power supply management module; and the power supply management module performs charging management work after receiving the power supply voltage or the conversion voltage. The device can be suitable for operation equipment with different rated voltages and is high in compatibility.
Description
Technical Field
The utility model relates to a power technical field particularly, relates to a charging circuit, auxiliary power supply and operation equipment.
Background
Some current operating devices need to be powered up after some circuit modules are powered off, so an auxiliary power supply is generally arranged to continuously supply power to some circuit modules after the operating devices are powered off.
The input power supply for charging the auxiliary power supply is the rated voltage of the power supply of the working equipment, and the rated voltage of the power supply of different working equipment is different, and the charging voltage range acceptable when the auxiliary power supply is charged is too narrow. Therefore, the same auxiliary power supply can not be suitable for operation equipment with different rated voltages, so that the compatibility of the conventional auxiliary power supply is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a charging circuit, auxiliary power supply and operation equipment, its operation equipment that can be applicable to different rated voltage, compatibility is very strong, for example.
The embodiment of the utility model discloses a can realize like this:
in a first aspect, an embodiment of the present invention provides a charging circuit, including a low-voltage input module, a high-voltage input module, and a power management module, where an input end of the low-voltage input module and an input end of the high-voltage input module are both electrically connected to an input power supply, and an output end of the low-voltage input module and an output end of the high-voltage input module are both electrically connected to the power management module;
the low-voltage input module is used for being in a conducting state when the power supply voltage provided by the input power supply is in a first voltage interval so as to provide the power supply voltage to the power supply management module;
the high-voltage input module is used for performing voltage conversion processing on the power supply voltage provided by the input power supply when the power supply voltage is in a second voltage interval to obtain a conversion voltage and providing the conversion voltage to the power supply management module;
and the power supply management module is used for carrying out charging management work after receiving the power supply voltage or the conversion voltage.
In an optional embodiment, the low-voltage input module includes a voltage stabilizing unit and a switch unit, the voltage stabilizing unit is electrically connected between the input power supply and a ground, an input end of the switch unit is electrically connected between the input power supply and the voltage stabilizing unit, and an output end of the switch unit is electrically connected to the power management module;
the voltage stabilizing unit is used for being in an off state when the power supply voltage is in a first voltage interval so as to enable the power supply voltage to be transmitted to the switch unit;
the switch unit is used for being in a conducting state after receiving the power supply voltage so as to provide the power supply voltage to the power supply management module.
In an optional embodiment, the voltage stabilizing unit includes a first voltage regulator tube, a cathode of the first voltage regulator tube is electrically connected to the input power supply, an anode of the first voltage regulator tube is electrically connected to the ground line, and an input end of the switch unit is electrically connected between the cathode of the first voltage regulator tube and the input power supply.
In an optional embodiment, the switch unit includes a first switch tube, a second switch tube, a first resistor and a second resistor, a first pin and a second pin of the first switch tube are electrically connected between the input power supply and the voltage stabilizing unit, the first resistor and the second resistor are connected in series between the input power supply and the ground, a third pin of the first switch tube and a first pin of the second switch tube are electrically connected between the first resistor and the second resistor, a second pin of the second switch tube is electrically connected to the input power supply, and a third pin of the second switch tube is electrically connected to the power management module.
In an optional embodiment, the high-voltage input module includes a voltage dividing unit and a switching power supply unit, the voltage dividing unit is electrically connected between the input power supply and a ground line, an input end of the switching power supply unit is electrically connected with the input power supply, an enable end of the switching power supply unit is electrically connected with the voltage dividing unit, and an output end of the switching power supply unit is electrically connected with the power supply management module;
the voltage division unit is used for carrying out voltage division processing on the power supply voltage to obtain a divided voltage and transmitting the divided voltage to an enabling end of the switching power supply unit;
the switching power supply unit is used for enabling the power supply voltage in a second voltage interval, and performing voltage conversion processing on the power supply voltage to obtain the conversion voltage.
In an alternative embodiment, the voltage dividing unit includes a third resistor and a fourth resistor, the third resistor and the fourth resistor are connected in series between the input power source and the ground, and an enable terminal of the switching power supply unit is electrically connected between the third resistor and the fourth resistor.
In an optional embodiment, the switching power supply unit includes a switching power supply chip, an input end of the switching power supply chip is electrically connected to the input power supply, an enable end of the switching power supply chip is electrically connected to the voltage dividing unit, and an output end of the switching power supply chip is electrically connected to the power management module.
In an optional embodiment, the power management module includes a charging management chip, and the charging management chip is electrically connected to the output terminal of the low-voltage input module, the output terminal of the high-voltage input module, and the battery;
and the charging management chip is used for charging the battery after receiving the power supply voltage or the conversion voltage.
In a second aspect, an embodiment of the present invention provides an auxiliary power supply, including a charging circuit as described in any one of the previous embodiments.
In a third aspect, embodiments of the present invention provide a working device, including an input power source and an auxiliary power source as described in the previous embodiments.
The embodiment of the utility model provides a charging circuit, auxiliary power source and operation equipment, this charging circuit is when the supply voltage that the input power provided is in first voltage interval, through low pressure input module to power management module power supply to make power management module carry out the management work of charging; when the power supply voltage provided by the input power supply is in the second voltage interval, the charging circuit supplies power to the power supply management module through the high-voltage input module so that the power supply management module performs charging management work. Therefore, the power management module can work when the power supply voltage provided by the input power supply is in the first voltage interval and the second voltage interval by arranging the low-voltage input module and the high-voltage input module. And then let auxiliary power supply can satisfy multiple supply voltage's input power, promoted auxiliary power supply's compatibility, practice thrift development cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an operating device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an auxiliary power supply according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another charging circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a charging circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another charging circuit according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of another charging circuit according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of another charging circuit according to an embodiment of the present invention.
Icon: 10-a working device; 100-an auxiliary power supply; 110-a charging circuit; 111-low voltage input module; 1111-a voltage stabilizing unit; 1112-a switching unit; 112-high voltage input module; 1121-voltage division unit; 1122-switching power supply unit; 113-a power management module; 120-a battery; 200-input power; ZV 1-first voltage regulator tube; ZV 2-second zener; q1-first switch tube; q2-second switch tube; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance; r9 — ninth resistor; u1-switching power supply chip; u2-charge management chip; d1 — first diode; d2 — second diode; d4-indicator light; c1 — first capacitance; an L-inductance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, a schematic diagram of an implementable structure of an operating device 10 according to the present embodiment is shown. The working device 10 includes an input power supply 200 and an auxiliary power supply 100, the input power supply 200 is electrically connected with the auxiliary power supply 100, and the input power supply 200 is used for supplying power to the auxiliary power supply 100 and other circuit modules in the working device 10; the auxiliary power supply 100 is used to supply power to a circuit block of the work equipment 10 that needs to be continuously supplied with power when the input power supply 200 cannot supply power.
It is understood that work device 10 may be a drone, an unmanned vehicle, a power system, and other powered devices. The input power source 200 may be a power supply source in the work apparatus 10. The auxiliary Power supply 100 may be an Uninterruptible Power Supply (UPS) or other Power supply including an energy storage device.
Please refer to fig. 2, which is a schematic diagram of an implementation of the auxiliary power supply 100 shown in fig. 1. The auxiliary power supply 100 includes a charging circuit 110, and the charging circuit 110 is electrically connected to an input power supply 200. The charging circuit 110 is capable of performing a charging management operation when the supply voltage provided by the input power source 200 is in the first voltage range and the second voltage range, so as to charge the auxiliary power source 100.
Further, as shown in fig. 2, the auxiliary power supply 100 further includes a battery 120, and the battery 120 is electrically connected to the charging circuit 110. The charging circuit 110 is configured to perform a charging operation on the battery 120 when the supply voltage provided by the input power source 200 is in the first voltage interval and the second voltage interval, so that when the input power source 200 stops supplying power, the battery 120 supplies power to a circuit module of the work apparatus 10 that needs to be continuously supplied with power.
Fig. 3 is a schematic diagram of an implementation of the charging circuit 110 shown in fig. 2. The charging circuit 110 includes a low voltage input module 111, a high voltage input module 112 and a power management module 113, wherein an input end of the low voltage input module 111 and an input end of the high voltage input module 112 are electrically connected to the input power 200, and an output end of the low voltage input module 111 and an output end of the high voltage input module 112 are electrically connected to the power management module 113.
In this embodiment, the low voltage input module 111 is configured to be in a conducting state when the supply voltage provided by the input power source 200 is in a first voltage interval, so as to provide the supply voltage to the power management module 113; the high voltage input module 112 is configured to perform voltage conversion processing on the power supply voltage provided by the input power supply 200 when the power supply voltage is in the second voltage interval, obtain a conversion voltage, and provide the conversion voltage to the power management module 113; the power management module 113 is configured to perform charging management after receiving a power supply voltage or a converted voltage.
It can be understood that when the magnitude of the power supply voltage provided by the input power supply 200 is in the first voltage interval, the low voltage input module 111 is in the conducting state, and the high voltage input module 112 is in the state of stopping the voltage conversion process, so that the power management module 113 only receives the power supply voltage provided by the low voltage input module 111. When the magnitude of the power supply voltage provided by the input power supply 200 is in the second voltage interval, the high voltage input module 112 performs voltage conversion processing on the power supply voltage to obtain a converted voltage, and the low voltage input module 111 is in an off state, so that the power management module 113 only receives the converted voltage provided by the high voltage input module 112. That is, the low voltage input module 111 and the high voltage input module 112 are not turned on at the same time, and the power management module 113 is not supplied with the supply voltage and the conversion circuit at the same time.
For example, if the power management module 113 performs the charging management operation in the 9V-15V power supply interval, the first voltage interval is 9V-15V, and the second voltage interval is 25V-60V. When the supply voltage provided by the input power source 200 is 12V, since 12V falls in the first voltage interval, the low voltage input module 111 is in a conducting state, the high voltage input module 112 is in a state of stopping the voltage conversion process, and the low voltage input module 111 provides the supply voltage of 12V to the power management module 113. When the supply voltage provided by the input power source 200 is 48V, since 48V falls in the second voltage interval, the high voltage input module 112 performs a conversion process on the supply voltage of 48V to obtain a conversion voltage in the 9V-15V supply interval, and the low voltage input module 111 is in an off state, so that the high voltage input module 112 provides the conversion voltage in the 9V-15V supply interval to the power management module 113.
As can be seen, the low voltage input module 111 and the high voltage input module 112 are arranged, so that the power management module 113 can operate when the power supply voltage provided by the input power supply 200 is in the first voltage interval and the second voltage interval. And then the auxiliary power supply 100 can meet the input power supply 200 with various power supply voltages, the compatibility of the auxiliary power supply 100 is improved, and the development cost is saved.
Referring to fig. 4, which is a schematic diagram of an implementable structure of the low voltage input module 111 in fig. 3, the low voltage input module 111 includes a voltage stabilizing unit 1111 and a switch unit 1112, the voltage stabilizing unit 1111 is electrically connected between the input power 200 and the ground, an input terminal of the switch unit 1112 is electrically connected between the input power 200 and the voltage stabilizing unit 1111, and an output terminal of the switch unit 1112 is electrically connected to the power management module 113.
In this embodiment, the voltage stabilizing unit 1111 is configured to be in an off state when the supply voltage is in the first voltage interval, so that the supply voltage is transmitted to the switching unit 1112; the switch unit 1112 is configured to be in a conducting state after receiving the power supply voltage, so as to provide the power supply voltage to the power management module 113.
It can be understood that when the supply voltage is in the first voltage interval, the supply voltage is too low to turn on the voltage stabilizing unit 1111. Therefore, the supply voltage flows to the switch unit 1112, the switch unit 1112 is in a conducting state after receiving the supply voltage, and the switch unit 1112 provides the supply voltage to the power management module 113 because the output end of the switch unit 1112 is electrically connected to the power management module 113.
To describe the working principle of the low-voltage input module 111 in detail, please refer to fig. 5, which is a schematic circuit diagram of the low-voltage input module 111 shown in fig. 4. The voltage stabilizing unit 1111 includes a first voltage regulator ZV1, a cathode of the first voltage regulator ZV1 is electrically connected to the input power source 200, an anode of the first voltage regulator ZV1 is electrically connected to a ground line, and an input terminal of the switch unit 1112 is electrically connected between the cathode of the first voltage regulator ZV1 and the input power source 200.
The switch unit 1112 includes a first switch Q1, a second switch Q2, a first resistor R1 and a second resistor R2, a first pin and a second pin of the first switch Q1 are electrically connected between the input power 200 and the voltage regulation unit 1111, the first resistor R1 and the second resistor R2 are connected in series between the input power 200 and the ground, a third pin of the first switch Q1 and a first pin of the second switch Q2 are electrically connected between the first resistor R1 and the second resistor R2, a second pin of the second switch Q2 is electrically connected to the input power 200, and a third pin of the second switch Q2 is electrically connected to the power management module 113.
It is understood that the first pin and the second pin of the first switch Q1 are electrically connected between the input power source 200 and the cathode of the first regulator ZV 1. When the supply voltage is in the first voltage range, the supply voltage is too low to turn on the first regulator ZV1, so that the supply voltage is provided to the first pin and the second pin of the first switch Q1, the second pin of the second switch Q2, and the first resistor R1. Since the first pin and the second pin of the first switch Q1 are at the same potential, the first switch Q1 is not conductive. Since the first resistor R1 and the second resistor R2 divide the power supply voltage, so that the voltage of the first pin of the second switch Q2 is lower than the voltage of the second pin of the second switch Q2, and the second switch Q2 is in a conducting state, the third pin of the second switch Q2 provides the power supply voltage to the power management module 113.
In this embodiment, the first switch Q1 may be a triode, the first pin of the first switch Q1 may be a base of the triode, the second pin of the first switch Q1 may be an emitter of the triode, and the third pin of the first switch Q1 may be a collector of the triode. The second switch tube Q2 may adopt a MOS (Metal Oxide Semiconductor, Metal-Oxide Semiconductor), specifically, a PMOS (positive channel Metal Oxide Semiconductor, P-channel Metal-Oxide Semiconductor) tube, the first pin of the second switch tube Q2 may be a gate of the MOS tube, the second pin of the second switch tube Q2 may be a source of the MOS tube, and the third pin of the second switch tube Q2 may be a drain of the MOS tube.
In order to prevent the current from flowing backwards, the voltage stabilizing unit 1111 further includes a first diode D1, a cathode of the first diode D1 is electrically connected to a cathode of the first voltage regulator ZV1, and an anode of the first diode D1 is electrically connected to the input power 200 and the first pin of the first switch Q1.
In order to prevent the first pin of the first switch Q1 from having too high current, the voltage stabilizing unit 1111 further includes a fifth resistor R5, the switch unit 1112 further includes a sixth resistor R6, the fifth resistor R5 and the sixth resistor R6 are connected in series between the input power source 200 and the first pin of the first switch Q1, the anode of the first diode D1 is electrically connected between the fifth resistor R5 and the sixth resistor R6, and the second pin of the first switch Q1 is electrically connected between the input power source 200 and the fifth resistor R5. The fifth resistor R5 and the sixth resistor R6 can perform a current limiting function, so as to reduce the input current of the first pin of the first switch tube Q1 and prevent the first switch tube Q1 from being damaged.
In order to prevent the second switch tube Q2 from being damaged, the switch unit 1112 further includes a second regulator tube ZV2, a cathode of the second regulator tube ZV2 is electrically connected to the second pin of the second switch tube Q2, and an anode of the second regulator tube ZV2 is electrically connected to the first pin of the second switch tube Q2. The second voltage regulator tube ZV2 can be turned on when the voltage difference between the first pin and the second pin of the second switch tube Q2 is too large, so as to prevent the second switch tube Q2 from being damaged.
Referring to fig. 6, which is a schematic diagram of an implementable structure of the high voltage input module 112 in fig. 3, the high voltage input module 112 includes a voltage dividing unit 1121 and a switching power supply unit 1122, the voltage dividing unit 1121 is electrically connected between the input power supply 200 and the ground, an input end of the switching power supply unit 1122 is electrically connected to the input power supply 200, an enable end of the switching power supply unit 1122 is electrically connected to the voltage dividing unit 1121, and an output end of the switching power supply unit 1122 is electrically connected to the power management module 113.
In this embodiment, the voltage dividing unit 1121 is configured to divide the power supply voltage to obtain a divided voltage, and transmit the divided voltage to the enable terminal of the switching power supply unit 1122; the switching power supply unit 1122 is configured to enable the supply voltage in the second voltage interval, perform voltage conversion processing on the supply voltage, and obtain a converted voltage.
It can be understood that the divided voltage is smaller than the power supply voltage, and when the power supply voltage is in the second voltage interval, the divided voltage obtained by the voltage dividing unit 1121 is greater than the enable voltage of the switching power supply unit 1122, and the switching power supply unit 1122 can start to operate to convert the power supply voltage into the converted voltage. When the power supply voltage is in the first voltage interval, the divided voltage obtained by the voltage dividing unit 1121 is less than the enable voltage of the switching power supply unit 1122, and the switching power supply unit 1122 does not operate and does not perform conversion processing on the power supply voltage.
To describe the operation principle of the high voltage input module 112 in detail, please refer to fig. 7, which is a schematic circuit diagram of the high voltage input module 112 shown in fig. 6. The voltage dividing unit 1121 includes a third resistor R3 and a fourth resistor R4, the third resistor R3 and the fourth resistor R4 are connected in series between the input power 200 and the ground, and the enable terminal of the switching power supply unit 1122 is electrically connected between the third resistor R3 and the fourth resistor R4.
The switching power supply unit 1122 includes a switching power supply chip U1, an input terminal of the switching power supply chip U1 is electrically connected to the input power supply 200, an enable terminal of the switching power supply chip U1 is electrically connected to the voltage dividing unit 1121, and an output terminal of the switching power supply chip U1 is electrically connected to the power management module 113.
In the present embodiment, the enable terminal of the switching power supply chip U1 is electrically connected between the third resistor R3 and the fourth resistor R4. If the enabling voltage of the switching power supply chip U1 is 1.3V, when the supply voltage is in the first voltage interval, the supply voltage is divided by the third resistor R3 and the fourth resistor R4, the obtained divided voltage is lower than the enabling voltage, and the switching power supply chip U1 is in a stop working state. When the power supply voltage is in the second voltage interval, the power supply voltage is divided through the third resistor R3 and the fourth resistor R4, the obtained divided voltage is higher than the enabling voltage, the switching power supply chip U1 normally works, the power supply voltage is converted into a conversion voltage, and the conversion voltage is provided to the power management module 113.
In order to adjust the magnitude of the converted voltage, the switching power supply unit 1122 further includes a first capacitor C1, an inductor L, a second diode D2, a seventh resistor R7, and an eighth resistor R8. The first capacitor C1 and the inductor L are connected in series between a self-boosting end of the switching power supply chip U1 and the seventh resistor R7, the seventh resistor R7 and the eighth resistor R8 are connected in series between the inductor L and the ground wire, the feedback end of the switching power supply chip U1 is electrically connected between the seventh resistor R7 and the eighth resistor R8, the cathode of the second diode D2 is electrically connected between the first capacitor C1 and the inductor L, the anode of the second diode D2 is electrically connected with the ground wire, and the switching control end of the switching power supply chip U1 is electrically connected between the first capacitor C1 and the inductor L. The output magnitude of the converted voltage can be adjusted by the first capacitor C1, the inductor L, the second diode D2, the seventh resistor R7 and the eighth resistor R8.
Referring to fig. 8, which is a schematic diagram of an implementable circuit of the power management module 113 in fig. 3, the power management module 113 includes a charging management chip U2, and the charging management chip U2 is electrically connected to the output terminal of the low voltage input module 111, the output terminal of the high voltage input module 112, and the battery 120; the charging management chip U2 is used to perform charging operation on the battery 120 after receiving the supply voltage or the converted voltage.
It can be understood that the input terminal of the charge management chip U2 is electrically connected to the third pin of the second switch Q2, the input terminal of the charge management chip U2 is electrically connected between the inductor L and the seventh resistor R7, and the output terminal of the charge management chip U2 is electrically connected to the battery 120. After the input terminal of the charging management chip U2 receives the supply voltage or the converted voltage, the charging management chip U2 charges the battery 120.
In order to remind the staff whether the battery 120 is in the charging state, the power management module 113 further includes a ninth resistor R9 and an indicator light D4, and the ninth resistor R9 and the indicator light D4 are connected in series between the input terminal of the charging management chip U2 and the charging state indicating terminal of the charging management chip U2.
It is understood that the indicator light D4 generates a light indication signal when the input terminal of the charging management chip U2 receives the supply voltage or the converted voltage. The ninth resistor R9 is used for adjusting the input current of the indicator light D4, so as to adjust the brightness of the indicator light D4.
For convenience of understanding, the operation principle of the charging circuit 110 will be described in detail, if the power management module 113 performs the charging management operation in the 9V-15V power supply interval, and if the first voltage interval is 9V-15V and the second voltage interval is 25V-60V, the enable voltage is 1.3V. When the supply voltage provided by the input power supply 200 is 9V-15V, for the high-voltage input module 112, the voltage of the enable terminal of the switching power supply chip U1 is lower than 1.3V through the voltage division of the third resistor R3 and the fourth resistor R4, and the switching power supply chip U1 stops working; for the low-voltage input module 111, because the cathode potential of the first regulator tube ZV1 is lower than the conduction voltage (the conduction voltage may be set to 15V), the first regulator tube ZV1 is not conducted, the first pin and the second pin of the first switch tube Q1 are at the same potential, the first switch tube Q1 is not conducted, because the potential of the second pin of the second switch tube Q2 is higher than the potential of the first pin of the second switch tube Q2, the second switch tube Q2 is in a conduction state, and the third pin of the second switch tube Q2 transmits the power supply voltage to the input end of the charge management chip U2.
When the supply voltage provided by the input power supply 200 is 16V-25V, for the high-voltage input module 112, the voltage of the enable terminal of the switching power supply chip U1 is lower than 1.3V through the voltage division of the third resistor R3 and the fourth resistor R4, and the switching power supply chip U1 stops working; for the low voltage input module 111, since the cathode potential of the first regulator tube ZV1 is higher than the turn-on voltage, the first regulator tube ZV1 is turned on to clamp the potential at the turn-on voltage, so that a circuit loop is formed among the input power supply 200, the first voltage-regulator tube ZV1 and the ground wire to obtain a current I1, for the first switch tube Q1, since the first pin of the first switch tube Q1 is smaller than the second pin of the first switch tube Q1, the first switch tube Q1 is turned on to form the input power 200, the first switch tube Q1, the second resistor R2 and the ground loop, the current I2 formed by the input power 200, the first switch tube Q1, the second resistor R2 and the ground loop flows through the second resistor R2, the first pin voltage of the second switch tube Q2 is enabled to satisfy Vg ═ I1+ I2) × r2 ≈ Vs, the second switch tube Q2 is turned off, the low-voltage input module 111 does not work, and the supply voltage to the input end of the charging management chip U2 is stopped. Vg is a first pin voltage of the second switch tube Q2, I1 is a circuit loop current formed among the input power supply 200, the first voltage regulator tube ZV1 and the ground, I2 is a circuit loop current formed among the input power supply 200, the first switch tube Q1, the second resistor R2 and the ground, R2 is a resistance value of the second resistor R2, and Vs is a second pin voltage of the second switch tube Q2.
When the supply voltage provided by the input power supply 200 is 26V-60V, for the high-voltage input module 112, the voltage of the enable end of the switching power supply chip U1 is higher than 1.3V through the voltage division of the third resistor R3 and the fourth resistor R4, the switching power supply chip U1 works normally, the switching power supply chip U1 converts the supply voltage into a conversion voltage, and provides the conversion voltage to the input end of the charging management chip U2; for the low voltage input module 111, since the cathode potential of the first regulator tube ZV1 is higher than the turn-on voltage, the first regulator tube ZV1 is turned on to clamp the potential at the turn-on voltage, so that a circuit loop is formed among the input power supply 200, the first voltage-regulator tube ZV1 and the ground wire to obtain a current I1, for the first switch tube Q1, since the first pin of the first switch tube Q1 is smaller than the second pin of the first switch tube Q1, the first switch tube Q1 is turned on to form the input power 200, the first switch tube Q1, the second resistor R2 and the ground loop, the current I2 formed by the input power 200, the first switch tube Q1, the second resistor R2 and the ground loop flows through the second resistor R2, the first pin voltage of the second switch tube Q2 is enabled to satisfy Vg ═ I1+ I2) × r2 ≈ Vs, the second switch tube Q2 is turned off, the low-voltage input module 111 does not work, and the supply voltage to the input end of the charging management chip U2 is stopped.
To sum up, the embodiment of the utility model provides a charging circuit, auxiliary power supply and operation equipment, this charging circuit include low pressure input module, high pressure input module and power management module, and the input of low pressure input module and the input of high pressure input module all are connected with the input power electricity, and the output of low pressure input module and the output of high pressure input module all are connected with the power management module electricity. The low-voltage input module is used for being in a conducting state when the power supply voltage provided by the input power supply is in a first voltage interval so as to provide the power supply voltage to the power supply management module; the high-voltage input module is used for performing voltage conversion processing on the power supply voltage when the power supply voltage provided by the input power supply is in a second voltage interval to obtain conversion voltage and providing the conversion voltage to the power supply management module; the power supply management module is used for carrying out charging management work after receiving the power supply voltage or the conversion voltage. Therefore, the power management module can work when the power supply voltage provided by the input power supply is in the first voltage interval and the second voltage interval by arranging the low-voltage input module and the high-voltage input module. And then let auxiliary power supply can satisfy multiple supply voltage's input power, promoted auxiliary power supply's compatibility, practice thrift development cost.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A charging circuit is characterized by comprising a low-voltage input module, a high-voltage input module and a power management module, wherein the input end of the low-voltage input module and the input end of the high-voltage input module are electrically connected with an input power supply, and the output end of the low-voltage input module and the output end of the high-voltage input module are electrically connected with the power management module;
the low-voltage input module is used for being in a conducting state when the power supply voltage provided by the input power supply is in a first voltage interval so as to provide the power supply voltage to the power supply management module;
the high-voltage input module is used for performing voltage conversion processing on the power supply voltage provided by the input power supply when the power supply voltage is in a second voltage interval to obtain a conversion voltage and providing the conversion voltage to the power supply management module;
and the power supply management module is used for carrying out charging management work after receiving the power supply voltage or the conversion voltage.
2. The charging circuit according to claim 1, wherein the low voltage input module comprises a voltage stabilizing unit and a switch unit, the voltage stabilizing unit is electrically connected between the input power supply and a ground, an input end of the switch unit is electrically connected between the input power supply and the voltage stabilizing unit, and an output end of the switch unit is electrically connected with the power management module;
the voltage stabilizing unit is used for being in an off state when the power supply voltage is in a first voltage interval so as to enable the power supply voltage to be transmitted to the switch unit;
the switch unit is used for being in a conducting state after receiving the power supply voltage so as to provide the power supply voltage to the power supply management module.
3. The charging circuit according to claim 2, wherein the voltage regulator unit comprises a first voltage regulator tube, a cathode of the first voltage regulator tube is electrically connected with the input power supply, an anode of the first voltage regulator tube is electrically connected with the ground wire, and an input end of the switch unit is electrically connected between the cathode of the first voltage regulator tube and the input power supply.
4. The charging circuit according to claim 2, wherein the switching unit includes a first switching tube, a second switching tube, a first resistor and a second resistor, a first pin and a second pin of the first switching tube are electrically connected between the input power source and the voltage regulator unit, the first resistor and the second resistor are connected in series between the input power source and the ground, a third pin of the first switching tube and a first pin of the second switching tube are electrically connected between the first resistor and the second resistor, a second pin of the second switching tube is electrically connected to the input power source, and a third pin of the second switching tube is electrically connected to the power management module.
5. The charging circuit according to claim 1, wherein the high voltage input module comprises a voltage dividing unit and a switching power supply unit, the voltage dividing unit is electrically connected between the input power supply and a ground, an input end of the switching power supply unit is electrically connected with the input power supply, an enable end of the switching power supply unit is electrically connected with the voltage dividing unit, and an output end of the switching power supply unit is electrically connected with the power management module;
the voltage division unit is used for carrying out voltage division processing on the power supply voltage to obtain a divided voltage and transmitting the divided voltage to an enabling end of the switching power supply unit;
the switching power supply unit is used for enabling the power supply voltage in a second voltage interval, and performing voltage conversion processing on the power supply voltage to obtain the conversion voltage.
6. The charging circuit according to claim 5, wherein the voltage dividing unit includes a third resistor and a fourth resistor, the third resistor and the fourth resistor are connected in series between the input power source and the ground, and an enable terminal of the switching power supply unit is electrically connected between the third resistor and the fourth resistor.
7. The charging circuit according to claim 5, wherein the switching power supply unit comprises a switching power supply chip, an input end of the switching power supply chip is electrically connected to the input power supply, an enable end of the switching power supply chip is electrically connected to the voltage dividing unit, and an output end of the switching power supply chip is electrically connected to the power management module.
8. The charging circuit of claim 1, wherein the power management module comprises a charging management chip electrically connected to the output of the low voltage input module, the output of the high voltage input module, and a battery;
and the charging management chip is used for charging the battery after receiving the power supply voltage or the conversion voltage.
9. An auxiliary power supply comprising a charging circuit as claimed in any one of claims 1 to 8.
10. A working device comprising an input power source and an auxiliary power source as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021257599.4U CN212183174U (en) | 2020-06-30 | 2020-06-30 | Charging circuit, auxiliary power supply and operation equipment |
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| CN202021257599.4U CN212183174U (en) | 2020-06-30 | 2020-06-30 | Charging circuit, auxiliary power supply and operation equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112841831A (en) * | 2021-03-02 | 2021-05-28 | Oppo广东移动通信有限公司 | Intelligent finger ring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112841831A (en) * | 2021-03-02 | 2021-05-28 | Oppo广东移动通信有限公司 | Intelligent finger ring |
| CN112841831B (en) * | 2021-03-02 | 2022-12-27 | Oppo广东移动通信有限公司 | Intelligent finger ring |
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Address after: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: XAG Co., Ltd. Address before: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Xaircraft Technology Co.,Ltd. |
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